These TCG rulings were issued by Upper Deck Entertainment and have since been deemed unofficial by Konami. They were previously considered official and can still be correct, as long as they follow the official gameplay rules, or unless Konami has issued a ruling that says otherwise. References: 
When this card inflicts Battle Damage to the opponent it is halved, regardless if it was a direct attack, or from an attack against another monster. For example, if your "Susa Soldier" (ATK 2000) attacks the opponent's "Gemini Elf" (ATK 1900), the opponent will take 50 points of Battle Damage. The damage points are rounded up when there is a fraction.
Lone Wolf: If you have "Monk Fighter" targeted by "Lone Wolf", the following are examples of monster effects that will NOT be negated because they are not applied to a monster: ... "Susa Soldier" (the damage to Life Points is still halved) ....
These TCG rulings were issued by Upper Deck Entertainment and have since been deemed unofficial by Konami. They were previously considered official, but may or may not necessarily hold true nowadays.